Just FYI, Lucan is the name of a rather widely despised British General from the last century: George Bingham, 3rd Earl of Lucan. He was the one who famously ordered the suicidal and senseless Charge of the Light Brigade. Lucan isn't in a class with Adolf, but it doesn't have particularly good associations for anyone who has ever been in the military.
As for Ben, every single Benjamin that I know has the middle name of Michael for some reason. I've never heard any of them complain about being called BM. Now, BJ I've heard complaints about, but in those cases the person was actually nicknamed BJ by the family and known by that when they started school.
PS: Benjamin Bradlee was the editor of the Washington Post for 23 years and is still on the newpaper's board. That's probably why the name is ringing a bell. He was a major figure in the Watergate scandal.